- In a large skillet, brown the meat in the oil. Season with salt and pepper. Transfer to a slow cooker. Set aside.
- In the same skillet, brown the onions in the butter. Season with salt and pepper. Sprinkle with the flour and mix well. Add the beer and bring to a boil while stirring. Transfer to the cooker and add the remaining ingredients. Mix well.
- Cover and cook at low temperature for 5 hours. Adjust the seasoning.
- Serve with mashed potatoes.